Developments in climate science have revealed a natural world so influenced by human activity that the epistemological division between nature and society can no longer be maintained. When global warming triggers feedback effects, such as melting permafrost and declining albedo from ice-melt, will we be seeing nature at work or human intervention? The mingling of the natural and the human has philosophical as well as practical significance, because the “object” has been contaminated by the “subject”.

Climate denial can be understood as a last-ditch attempt to re-impose the Enlightenment’s allocation of humans and Nature to two distinct realms, as if the purification of climate science could render Nature once again natural, as if taking politics out of science can take humans out of Nature. The irony is that it was Enlightenment science itself, in the rules laid down by the Royal Society, that objectified the natural world, putting it on the rack, in Bacon’s grisly metaphor, in order to extract its secrets. We came to believe we could keep Nature at arms-length, but have now discovered, through the exertions of climate science, something pre- moderns took for granted, that Nature is always too close for comfort.